/*
 * Copyright 2010 eBusinessInformation
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.excilys.blog.refactoring.refactored;

import java.util.List;
import java.util.Set;

import com.excilys.blog.refactoring.GeoPoint;
import com.excilys.blog.refactoring.HullHelper;

class RefactoredHullHelper implements HullHelper {

    public List<GeoPoint> computeConvexHull(Set<GeoPoint> points) {
        GeoPointSet geoPointSet = new GeoPointSet(points);

        geoPointSet.checkPreconditions();
        if (geoPointSet.hasOnePoint()) {
            return geoPointSet.copyAsList();
        } else {
            HullFinder hullFinder = new HullFinder(geoPointSet);
            return hullFinder.findAntiClockwiseHull();
        }
    }

}
